conducted in the back woods of fort leonardwood, missouri, it is one of the toughest combat schools inhe army. >> this is a dirty, nasty, tough course, and it is going to test you in ways that perhaps some people just don't want to be tested. >> reporter: and the only combat training of its kind that accepts women. first lieutenant audrey motin and second lieutenant carly turnidge have signed up to try to earn the coveted title. sapper. both are graduates of west point. motin was in the seventh grade on 9/11 and decided then she would join the army. >> i'm just very competitive and in the back of my mind i'm like, you can do this. >> reporter: turnidge comes from a strong military family. her father was a green beret. >> i'm still here to prove myself and prove i can do the same things the guys can do. >> reporter: but here each must prove herself not as a woman but as a soldier. >> they have to. the standard doesn't change just because they're a woman. >> reporter: over 28 days with little sleep or food these 38 soldiers will go through living hell. >> it's all part of pushing them to